Improvement in traps



W. CHRISTIE. Trap.

Paterited Nov. '5, 1878.

%M6 Jaw E S PNOTO-LITKOGRAPMER, WASHINGTON 0 c UNITED STATES PATENTOFFICE.

WILLIAM CHRISTIE, OF NEW YORK, N; Y.

IMPROVEMENT IN TRAPS.

Specification forming part of Letters Patent No. 209,653, dated November5, 1878; application filed April 3, 1878.

To all whom z'tmay concern: 7

Be it known that I, WILLIAM CHRISTIE, plumber, of New York city, in theState of N ew York, have invented certain new and useful Improvementsrelating to Traps and Connections, of which the following is aspecification:

T make an efficient trap on the side of and in one with the uprightpipes of cast-iron or other material employed in house-plumbing; and Ihave devised efficient and convenient means for connecting the ordinarylead pipes thereto.

The following is a description of what I.

consider the best means of carrying out the invention.

The accompanying drawings form a part of this specification.

Figure 1 is a central vertical section, and Fig. 2 is a side elevation,of my improved trap.

Similar letters of reference indicate like parts in both the figures.

A is a portion of the ordinary upright pipe, which is supposed to beformed in lengths and to extend from the top to the bottom of adwelling, the upper end being in the best practice open through theroof.

A is the ordinary hub or enlargement, which receives the base of thesection above.

A is a trap opening into the side of the pipe and formed in a singlecasting therewith. The curved bottom of the trap intersects or joins thepipe A below the opening in the latter. a represents a partitionextending downwardly in the trap, to prevent the escape of foul gasesfrom the pipe A out through the branch pipe B.

By this construction no foul gases can escape from the main pipe Athrough the branch pipe B as long as the water in the trap is slightlyabove the lower edge of the partition to. It may be equipped with anordinary removable plug in the bottom to facilitate cleaning, if suchshall ever be required. The outer end is formed with an enlargement orhub, A adapted to receive the smaller end of a branch pipe.

B is the branch pipe flowing from a handbasin, water-closet, urinal,bath-tub, sink, or any other piece of apparatus. It may in some casesreceive water from the whole or a poror interior of the hub A tion ofthe roof. The junction is peculiarly formed. The body of the pipe B ismade sm, ller than the interior of the hub A and is received in aclose-fitting hole in a movable locking device, D D, the claws D ofwhich engage strongly with the part A as will presently appear. Afterthe device D D has been applied on the lead pipe B, the end of thelatter is enlarged, as indicated by B, thus forming a reliable head,which fills the socket What space remains unfilled is stopped by thecement G.

The exterior of the trap adjacent to the hub A is formed with wedge-likeprojections A, arranged, as shown, with spaces between. These spaces areeach of a width a little greater than the corresponding claw D of thelockingpiece D D. After the cement O has been properly applied thelocking device D D is drawn firmly down, thereby seizing the pipe B byits enlargement B,and, the claws D being properly made to pass throughthe spaces between the locking-projections A, the device D D is forciblyturned around. By this turning movement the claws D are brought engagedunder the inclined faces of the lockingpieces A, and the joint is madestrong and tight.

There maybe another trap independent of this trap A between thehand-basin or other apparatus and the stand-pipe A but I do not esteemsuch generally necessary. The trap A will perform all its usualfunctions, and, being cast in one with the pipe A is economical ofexpense, and, what is of great importance, reduces the liability offracture or leakage between the trap and the stand-pipe. Another pointof great practical importance lies in the fact that in many or mostcases water trickling down from a higher point will find its way into mytrap A by reason of its contiguity and its mode of presentation to thestand-pipe. Thus, if a room is unoccupied, or for any reason anapparatus is not used, the foul gases which are liable to rise in thepipe A cannot flow into the apartment, because the trap will, by thewater trickling down the pipe A, be kept filled sufficiently tocompensate for evaporation.

Modifications may be made. The trap may be placed near the middle ornear the bottom of a length of pipe, A, instead of at the top, as hereshown.

Some portion of the benefit of the invention may be realized without thefastening means D D. In such case any ordinary form of pipe may beemployed for the branch, and the joint between such branch and myenlargement or hub A may be made of any ordinary cementing material,applied in the ordinary manner, without my peculiar provisions forjoining.

1 claim as my invention- 1. The trap A, having the partial partition a,and formed in a single casting with such stand-pipe, with its bottomjoined thereto below the opening, as shown, in combination with astand-pipe, A, extending from the bottom to or near the top of thebuilding, and with a branch pipe, B, so that the trap shall not onlyperform its ordinary functions relatively to the communication to andfrom the branch, but shall, when the branch is disused,

tend to keep full by any water trickling down 7

